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[snip]
In other words, "add an extra check wherever a compass direction is displayed".
What I disagree with is that it requires "sweeping surgical code changes". It requires a few very simple commands, a little tweaking to existing code, and a few search-and-replaces.
By treating it as a dynamic flag, rather like a colour-code, which is changed depending on the viewer.
Randomise it.
Like all things it depends how far you want to take it, but the functionality you've described would make for a pretty small snippet.
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